Journals →  Gornyi Zhurnal →  2020 →  #9 →  Back

ArticleName Improving quality of magnetite concentrates based on magnetic–gravity separation
DOI 10.17580/gzh.2020.09.10
ArticleAuthor Opalev A. S.

Mining Institute, Kola Science Center, Russian Academy of Sciences, Apatity, Russia:

A. S. Opalev, Deputy Director of Science, Candidate of Engineering Sciences,


The paper addresses improvement of quality of iron ore concentrates produced from ferruginous quartzites to the level of Fetotal content of at least 70% suitable for direct reduction of iron. The article analyzes the main causes for the low quality of iron ore in the mining industry, which hinder the widespread introduction of nonblast furnace metallurgy processes. Two ways of solving this problem are considered: traditional superfine grinding in vertical mills for deep beneficiation of magnetite ores with magnetic separation, ultrafine screening and reverse flotation in column machines and dewatering with ceramic filters; innovative approach based on the rational use of grinding energy in ore preparation processes by implementing the principle of stage-wise output of the final concentrate using fine screening and magnetic–gravity separation. The research results on the development of an innovative technology for processing ferruginous quartzites by magnetic–gravity separation to produce high-quality magnetite concentrates with a total mass fraction of iron of at least 70% are presented. The data on the main stages of commercial-scale magnetic–gravity separation on industrial separator MGS-2.0 equipped with modern automation system at ferruginous quartzites processing plants in the northwest of Russia are presented.

keywords Ferruginous quartzites, magnetite, concentrate, intergrowth, magnetic–gravity separation, stage-wise output, innovative technology, separator MGS-2.0, commercial-scale development

1. Patkovskaya N. А., Tasina Т. I. The Russia North-West Region iron-containing ores processing technology improvement. Obogashchenie Rud. 2011. No. 1. pp. 6–10.
2. Lu L. Iron Ore: Mineralogy, Processing and Environmental Sustainability. Cambridge : Woodhead Publishing, 2015. 631 p.
3. Kuskov V. B., Sishchuk Yu. M. Improvement of beneficiation technologies for iron oren of various type and material cons titution. Gornyi Zhurnal. 2016. No. 2. pp. 70–74. DOI: 10.17580/gzh.2016.02.14
4. Yushina T. I., Petrov I. M., Avdeev G. I., Valavin V. S. Analysis of state-of-the-art in iron ore mining and processing in the Russian Federation. Gornyi Zhurnal. 2015. No. 1. pp. 41–47. DOI: 10.17580/gzh.2015.01.08
5. Bersenev I. S., Ganin D. R., Druzhkov V. G., Panychev А. А. Regularities of the concentration of chemical elements in the minerals of aglomerates from the magnetite concentrate of the Mikhailovskoe deposit. Chernye Metally. 2018. No. 12. pp. 15–19.
6. Gzogyan T. N., Melnikova N. D. Influence exerted by microhardness of basic minerals of ferruginous quartzites on the technological properties. Journal of Mining Science. 2001. Vol. 37, Iss. 3. pp. 330–340.
7. Vaisberg L. A., Korovnikov A. N. Fine screening as an alternative to hydraulic size classification. Obogashchenie Rud. 2004. No. 3. pp. 23–34.
8. Pelevin А. Ye., Lazebnaya М. V. Application of Derric screens in locked grinding circuit at the «KMAruda» Mining Complex concentrating plant. Obogashchenie Rud. 2009. No. 2. pp. 4–8.
9. Smirnov Yu. A. Technologies of milling with mixing of actuation medium. Gornaya promyshlennost. 2014. No. 6(118). p. 56.
10. Makinde O. A., Ramatsetse B. I., Mpofu K. Review of vibrating screen development trends: Linking the past and the future in mining machinery industries. Internationa Journal of Mineral Processing. 2015. Vol. 145. pp. 17–22.
11. Ignatova T. V., Shelepov E. V. Column flotation of complex ferruginous ore of the Mikhailovskoe deposit. GIAB. 2011. No. 4. pp. 241–245.
12. Ismagilov R. I., Golenkov D. N., Shelepov E. V., Ignatova T. V. Modern ways of enhancing efficiency of unoxidized quartzite processing. Problems and Prospects of Efficient Mineral Processing in the 21st Century (Plaksin’s Lectures-2019) : International Conference Proceedings. Irkutsk : Reprotsentr A1, 2019. pp. 134–136.
13. Ivanova K. K., Prokopev S. A., Prokopev E. S., Turetskaya N. Yu. High-quality iron concentrate production by screw separation. Problems and Prospects of Efficient Mineral Processing in the 21st Century (Plaksin’s Lectures-2019) : International Conference Proceedings. Irkutsk : Reprotsentr A1, 2019. pp. 243–246.
14. Usachev P. A. Production of high-quality ferrous concentrates at the concentration plant of Lebedinskii mining and concentration integration works. Gornyi Zhurnal. 2000. No. 3. pp. 41–44.
15. Opalev A. S., Biryukov V. V., Burenina I. V. The mechanism for the selective separation of magnetite products in magnetic stabilize fluidized bed gravity separator. Nauchnyi vestnik Moskovskogo gosudarstvennogo gornogo universiteta. 2013. No. 3. pp. 37–48.
16. Busciglio A., Vella G., Micale G., Brandani S. Modeling of Magnetic-Field-Assisted Fluidization: Model Development and CFD Simulation of Magnetically Stabilized Fluidized Beds. KONA Powder and Particle Journal. 2015. Vol. 32. pp. 217–226.
17. Espin M. J., Quintanilla M. A. S., Valverde J. M. Magnetic stabilization of fluidized beds: Effect of magnetic field orientation. Chemical Engineering Journal. 2017. Vol. 313. pp. 13 35–1345.
18. Quanhong Zhu, Hongzhong Li, Qingshan Zhu, Qingshan Huang. Modeling of segregation in magnetized fluidized bed with binary mixture of Geldart-B magnetizable and nonmagnetizable particles. Chinese Journal of Chemical Engineering. 2018. Vol. 26, Iss. 6. pp. 1412–1422.
19. Opalev A. S., Khokhulya M. S., Fomin A. V., Karpov I. V. Creation of innovative technologies for production of high-quality iron concentrate production in the North West of Russia. Gornyi Zhurnal. 2019. No. 6. pp. 56–61. DOI: 10.17580/gzh.2019.06.07
20. Fedotov P. K. Interparticle destruction of ore. Moscow : Geoinformmark LLC, 2011. 136 p.
21. Harder J. Tre nds in the Crushing of Mineral Ores. Mineral Processing. 2016. No. 5. pp. 21–26.

Language of full-text russian
Full content Buy